MaxGekk commented on a change in pull request #34256:
URL: https://github.com/apache/spark/pull/34256#discussion_r727315953
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
##########
@@ -658,6 +658,13 @@ case class Rint(child: Expression) extends
UnaryMathExpression(math.rint, "ROUND
since = "1.4.0",
group = "math_funcs")
case class Signum(child: Expression) extends UnaryMathExpression(math.signum,
"SIGNUM") {
+ override def inputTypes: Seq[AbstractDataType] =
+ Seq(TypeCollection(DoubleType, YearMonthIntervalType, DayTimeIntervalType))
+ protected override def nullSafeEval(input: Any): Any = child.dataType match {
Review comment:
I think we could avoid checking the type in runtime completely:
```scala
protected override def nullSafeEval(input: Any): Any = {
f(input.asInstanceOf[Number].doubleValue())
}
```
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